Quantum 5, 569 (2021). https://doi.org/10.22331/q-2021-10-27-569 Sharing correlated random variables is a resource for a number of information theoretic tasks such as privacy amplification, simultaneous message passing, secret sharing and many more. In this article, we […]
Quantum 5, 568 (2021). https://doi.org/10.22331/q-2021-10-27-568 The fermionic quantum emulator (FQE) is a collection of protocols for emulating quantum dynamics of fermions efficiently taking advantage of common symmetries present in chemical, materials, and condensed-matter systems. The […]
Quantum 5, 567 (2021). https://doi.org/10.22331/q-2021-10-20-567 The Quantum Fisher Information matrix (QFIM) is a central metric in promising algorithms, such as Quantum Natural Gradient Descent and Variational Quantum Imaginary Time Evolution. Computing the full QFIM for […]
Quantum 5, 566 (2021). https://doi.org/10.22331/q-2021-10-19-566 We consider performing phase estimation under the following conditions: we are given only one copy of the input state, the input state does not have to be an eigenstate of […]
Quantum 5, 565 (2021). https://doi.org/10.22331/q-2021-10-19-565 Photonic cluster states are a powerful resource for measurement-based quantum computing and loss-tolerant quantum communication. Proposals to generate multi-dimensional lattice cluster states have identified coupled spin-photon interfaces, spin-ancilla systems, and […]
Quantum 5, 564 (2021). https://doi.org/10.22331/q-2021-10-19-564 We present a quantum error correcting code with $textit{dynamically generated logical qubits}$. When viewed as a subsystem code, the code has no logical qubits. Nevertheless, our measurement patterns generate logical […]
Quantum 5, 563 (2021). https://doi.org/10.22331/q-2021-10-19-563 We study the quantum-classical correspondence of an experimentally accessible system of interacting bosons in a tilted triple-well potential. With the semiclassical analysis, we get a better understanding of the different […]
Quantum 5, 562 (2021). https://doi.org/10.22331/q-2021-10-14-562 Iterative decoders for finite length quantum low-density parity-check (QLDPC) codes are attractive because their hardware complexity scales only linearly with the number of physical qubits. However, they are impacted by […]
Quantum 5, 561 (2021). https://doi.org/10.22331/q-2021-10-07-561 Entanglement in symmetric quantum states and the theory of copositive matrices are intimately related concepts. For the simplest symmetric states, i.e., the diagonal symmetric (DS) states, it has been shown […]
Quantum 5, 560 (2021). https://doi.org/10.22331/q-2021-10-07-560 A leading proposal for verifying near-term quantum supremacy experiments on noisy random quantum circuits is linear cross-entropy benchmarking. For a quantum circuit $C$ on $n$ qubits and a sample $z […]
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